Thousands of "penis fish" has been washed up on Drakes Beach, 50 miles north of San Francisco. Urechis caupo is actually not a fish but a kind of marine worm also known as the fat innkeeper worm. It does have certain visual likenesses to a penis though. The worms are almost exclusive to California and dates back at least 300 million years.
Otters, flounders, sharks, rays, gulls, and humans eat them, and they are considered a culinary delicacy in South Korea where they reputedly has an aphrodisiac effect. This belief might have something to do with their phallic looks, but You don't know untill You've tried it, right?
The worms usually lives in u-shaped tunnels under the sand and it's rare to see them in large numbers. The reason for the "invasion" is probably strong storms and heavy rain destroying their burrows and flushing them away and ashore.
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